Ignition material.



itjrsaggiea IUNIYEED smite i., ingested October a PATENT Enrica,

"insertion MATEREAL.

srnolmcaauont forming part of Letters Patent No, 773,492, dated. October 25, 1 904. Application ma ra 6, I904. semi-na'zosflia (No e nt.)

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Be it known that L'Rosnnr ERNST ALWIN GANs chemist, a sub ect of the Grerman Em-v peror, residing at Pankow, near BerlingGer runny, (whose .post'- ofice address is Parkstrasse 12, Pankow, near Berlin, Germany,) have invented a certain new and useful Ignition Material or Priming CompositionSuitable for the Manufacture of Matches, of which the following is a specification. v 1 Letters Patent No. 698, 698 describes an igni-, tion material for matches, consisting of a 'mixture of a substance which readily yields mix the polythionate with finely-divided sulfur-and gently heat the .mixture either dry or in the presence of water, or I grind the said mixture under pressure, during which Qpfll'a ation the yellow color of the mixture changes 'into a reddishcolor, and if moisture is present the volume of the mixture increases considerably, which serves to prove that the product thus obtained is not a mere mechanical mixture of sulfur and polythionate, buta chemical compound. The proportions of the two constituents may vary between wide limits. Useful priming compositions have been obtained, for instance, by causing three parts 4 of sulfur to act on ten parts of cupro-barium tetra-thi=t nate and also by causing equal parts of the said constituents to act upon each other. Suli'o-polythionates are sparingly soluble in water. By hot water they are gradually decomposed while assuming a green to black color. in ammonia they are partly soluble while being decomposed and assuminga blue color. They resist atmospheric influences better than is the case with polythionates.

glue. very quietly and slowly.

When gently heated with a solution of glue, they will not precipitatgthe latter; In mixlule with glue they graduall'y'form a solid and hard mass. Potassium chlorate is .more

easily reduced bys ulfo-polythionates than by polythionates'l Fox-preparing the neWig'niting or priming composition these sulfur compounds of polythionates prepared as described? are mixed with "oxygen yielding substances; such aslpotassium chlorate; j v y The dipping-bath prepared frg, this mixtu're' may be preserved in goodconditionwfor several days and is not sensitive to moderate j heating. The heads of .matches dipped into. such a compositionare' very solid and easily. ignitible on ordinary and also on very rough friction-surfaces, andlthe' binding substance used in its manufacture need not be the expensive gelatin, but may be ordinary cheap v The heads of' such matches 'burnpfi 1. The new ignl whichsulfo-polythionate can be obtained from c I ting composition consisting of a sulfo-polythionate and an oxidizing agent, v 7 5 I a polythionate and finely-divided sulfur byf gently heating a-mixtu're'of the ,said materials; thereby changing the yellow color into reddish; the said sult'o-polythionate 'being ual decomposition by hot water; while assuming a green to black color, partly soluble in sparingly soluble in water, capable ofg'rad 39 ammonia, while undergoingdecomposition and assuming a blue color, resisting atmosf pheric influences better than the polythionates and not precipitating glue from. a solu:

tion, when gently heated with the same;-' thel saidsulfo-polythionate gradu lly forming'a' hard solid mass when in mix ure withglue,

and reducing potassium chlorate more easily than polythionate, substantially as described.- 1

2. The new igniting composition consisting of a sulfur compound of cupro-barium tetrathionate and potassium chldrate, which sul-v fur compound can be obtained from cuprobarium tetra-thionate and ,finely-dividedsulfur by gently heating a mixture of the said materials, thereby changing theyellowcolor ofthe mixture into reddish, the said sulfurcupro'barium tetra-thionate being sparingly soluble in watei', capable ofgradual decomand being more efficie t than cupi o-bariun; position by hot Water, While assuming a tetra-thionate as a reducing agent for potasgre'en-black color, partly soluble in ammonia, siuni chlorate, substantially as described. while undergoing decomposition and essmn- In witness whereof I have signed this speci- 5 ing a'blue color, resistingntmospheric influfication in the presence of two subscribing witences better than the, polythionates and not 'nesses.

precipitating glue from a solution, when ROBERT ERNST ALWIN GANS. gently heated with the same; the said cupro- In presence of-- barium tetra-thionate gradually forming a ROBERT VVACHE,

.1 hard solid mass when in mixture with glue. l HERMANN SL'HSENGUTT. 

